The most common and most likely answer to this crossword clue is the 6 letter word ITALIC
I've seen this crossword clue in Independent
I
T
A
L
I
C
More clues leading to the result ITALIC
- Fantasy heroine abridged after appeal for emphatic writing style
- Type of children’s book heroine mostly following it
- Character with inclination for one toiletry containing iodine
- Like this list of letters?
- Regularly seen in mist, tall birch tilting
- Character inclined to be kept within hospital ICU
- Type of digital icons symmetrically cropped
- Character for listing?
- Put in charge after half of hospital’s showing stress?
- One’s inclined to be emphatic
Buddy explains!

The straight part
We know that "showing stress (in a written passage)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case showing stress (in a written passage) = italic.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ITALIC mean?
ITALIC noun- A typeface in which the letters slant to the right.
- An oblique handwriting style, such as used by Italian calligraphers of the Renaissance.
- (of a typeface or font) Designed to resemble a handwriting style developed in Italy in the 16th century.
- (of a typeface or font) Having letters that slant or lean to the right; oblique.